Wireless network system for achieving synchronous acquisition, synchronous acquisition device and method

Abstract

The invention discloses a wireless network system for achieving synchronous acquisition, a synchronous acquisition device and a method. The wireless network system for achieving synchronous acquisition comprises a master controller and n wireless data collection terminals (n is greater than or equal to 2). The synchronous acquisition device comprises a GPS receiver, a CPLD clock processing module and an analog digital converter. The method for achieving synchronous acquisition includes the steps that the data collection terminals are divided into a main data collection terminal and a plurality of assistant data collection terminals, the fact that all the data collection terminals are in a Ready state is confirmed before acquisition, then the master controller sends a Prestart order to the main data collection terminal, the main data collection terminal replies an OK order after receiving the Prestart order when the next PPS arrives, the master controller sends a Start order to all the data collection terminals after receiving the Prestart order, starting of all the data collection terminals at the same moment is achieved through the process, and synchronous acquisition is achieved ultimately.

Description

Technical field [0001] The present invention relates to data collection technology, in particular to a wireless network system, a synchronous collection device and a method for realizing synchronous collection. Background technique [0002] With the development of network technology, data acquisition systems based on wireless networks are increasingly used in real-time communication in industrial sites. Many monitoring projects have scattered monitoring points and have real-time characteristics, such as earthquakes, typhoons, traffic accidents, etc., requiring very accurate time synchronization for monitoring data of various parts. Only when the specific parameter information is collected synchronously can the monitoring object and working environment be comprehensively analyzed, and the situation on the spot can be accurately judged. General data collection technology is difficult to meet such monitoring requirements. If synchronous collection technology is not used, it is very...

AI Technical Summary

Problems solved by technology

It is difficult for general data acquisition technology to meet such monitoring requirements. If synchronous acquisition technology is not used, it is very likely to cause small errors in the time of data collection at each monitoring point, which will not only cause inaccurate monitoring results, but also seriously affect research and analysis.

[0003] Chinese Patent Publication No. CN1024972A, published on June 13, 2012, titled "A Data Synchronous Recognition Device for a Multi-ADC High-speed Data Acquisition System", the application discloses a multi-ADC high-speed timing device with data synchronous recognition function The alternate acquisition system uses a data sequence identification module to measure the phase relationship between the synchronous clocks of each ADC data, and realizes the correct combination of parallel time alternate sampling data and sampling time. The disadvantage is that it is still impossible to realize multiple terminals in the system synchronous acquisition of

Its disadvantages are: although each wireless network node starts to collect data at the same time, the synchronization needs to be consistent with the sampling frequency, otherwise it cannot be synchronized; and the data frame contains more time information, and the overhead of network transmission is relatively high. Large, which in turn affects the transmission efficiency of the entire network

[0005] It can be seen from this that there are still some disadvantages in the existing technology to start and complete the synchronous data acquisition work and the synchronous acquisition between wireless data acquisition terminals at the same time.

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